Year	2010 U.S. Dollars
1980-01-01	645.544405543079
1981-01-01	645.527130262814
1982-01-01	613.079210652012
1983-01-01	594.920485670849
1984-01-01	558.969580596202
1985-01-01	594.511974224745
1986-01-01	554.207467407727
1987-01-01	557.807078521036
1988-01-01	555.321324870288
1989-01-01	532.851308346210
1990-01-01	507.895779429347
1991-01-01	486.984677763978
1992-01-01	635.249741831416
1993-01-01	682.164150092276
1994-01-01	768.866811590765
1995-01-01	871.588665703865
1996-01-01	1398.892660703110
1997-01-01	3364.352899355850
1998-01-01	4002.270952043120
1999-01-01	4831.072653430600
2000-01-01	5484.300832117260
2001-01-01	8603.955679428750
2002-01-01	9867.562102567950
2003-01-01	10788.028906751800
2004-01-01	14266.927916874100
2005-01-01	15941.646978170200
2006-01-01	16413.540408365100
2007-01-01	18075.176761142300
2008-01-01	20333.940443173700
2009-01-01	19684.697005926300
2010-01-01	17136.445675758300
2011-01-01	17461.551924176900
2012-01-01	18106.336658310400
2013-01-01	16634.767673040900
2014-01-01	16028.249537399100
2015-01-01	14001.599125908700
2016-01-01	12317.714226203000
2017-01-01	11486.610958217300